National Summary

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In week 07, all influenza indicators remained similar to, or declined, from the previous week.

Overall, elevated activity was mostly reported in the Central and Atlantic provinces.

For the past few weeks, influenza B detections have been increasing steadily, particularly in the Prairies and in Quebec. In week 07, influenza B detections were greater than influenza A detections in QC and AB. This increase in influenza B is expected as influenza B often shows up later in the flu season.

A(H3N2) continues to be the most common type of influenza affecting Canadians. Seniors continue to have the highest number of positive laboratory detections, hospitalizations and deaths.

Detections of respiratory syncytial virus (RSV) continue to be the second most frequently detected virus after influenza.

Evidence from the National Microbiology Laboratory (NML) does indicate that this year's vaccine will continue to provide protection against the circulating A(H1N1) and B strains.

National Flu Test

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Province

Feb 15-Feb 21, 2015

Total Flu Season 2014-2015

British Columbia

Alberta

Saskatchewan

Manitoba

Ontario

Quebec

New Brunswick

Nova Scotia

Prince Edward Island

Newfoundland

Canada

143

58

13

21

397

508

69

36

7

27

1279

3282

4003

1320

1134

10033

11741

769

423

107

568

33380

(2014 - Feb 21, 2015)

About the Active Weather Trigger

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Active weather triggers are changes in the weather that could augment health complaints. Each active weather trigger is weighted equally. The occurrence of more than one trigger increases the severity of health risk.